This may be relevant in diagnosis and/or therapy, especially since the increased expression of KCa1.1 β3-encoding gene KCNMB3 correlates with poor survival of GBM patients10 and increased β3 auxiliary subunit expression was described in fibroblast-like synoviocites in rheumatoid arthritis9. The gene discussed is KCNMA1; the disease is glioblastoma.